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[alsa-devel] Call for Explanation of ALSA Config Behavior
by Jeff Rush 05 May '07

05 May '07

I'm trying to get ALSA to support all the little features of my laptop, which is based on the Intel HDA chipset with the Realtek codec. I'm also playing with the softvol plug to add a volume controls over certain virtual devices. A few questions I can't figure out: 1. Isn't it the standard convention that there be a control named "Master" that adjusts the overall volume of a device? So why does the Intel HDA ALSA driver define one named "Headphone" that does the same thing instead of following that convention? Is there some reason, or perhaps a difference in opinion within the ALSA community on the naming of controls? Shouldn't every ALSA driver define a "Master" control? 2. When I add a control using the softvol plugin, the mixer GUI shows it in both the playback and the capture set of controls. Why and how can I tag a control to belong to only one set or the other? Being a volume control it seems it should only be in the playback collection. 3. Once I add such a control, it -never- goes away. What I mean is that if I rename it, or remove it, and restart ALSA or even restart the entire computer, the old name for the control always shows up in the mixer GUI. I've grepped *all* of /etc, looking in the /etc/asound.conf, /etc/asound.state and ~/.asoundrc files but the old name isn't anywhere -- where is it coming from? Thanks very much for any help you can provide, For years I've just tried to "use" ALSA but now I'm trying to actually understand its subtle nuances. -Jeff

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[alsa-devel] DMix period_size should always be half of buffer size?
by Prabhu Sivaraja 04 May '07

04 May '07

This is a followup to my earlier question about dmix not being able to mix small files. I investigated it more and here is what I found. Again background info. I have a 64KB as kernel buffer and a 64KB circular buffer for my device. In a poll thread I copy the data obtained from ALSA lib from the kernel buffer to my device circular buffer by keeping track of appl_ptr and hw_ptr(dmix only). Everything was working fine except when I was trying to mix files smaller than 64KB(my buffer size), the small file was not getting mixed through the dmix plugin. Anything over 64KB was getting mixed just fine. So I set about reducing my period size from 32KB to 4KB while maintaining my buffer size at 64KB. When I tried to do this my hw_ptr never gets incremented from 0. Hence my driver is stuck in a loop waiting for bytes to copy. This is only observed when I am using dmix plugin and NOT when using hw or plughw. When my period size is half the size of my buffer everything works fine with dmix (I verified this by reducing my buffer size to 8KB and making my period size 4KB. hw_ptr gets incremented then but I get buffer problems). It seems like dmix is forcing me to keep my period size half the size of my buffer. hw and plughw devices do not seem to do that. Is this a limitation of dmix. Could anyone comment on the dmix limitation that I am experiencing. Thanks a lot of all your help. Prabhu.

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[alsa-devel] Aureon 7.1 Firewire supported by ALSA ?
by Michael Gerdau 04 May '07

04 May '07

Hi list, looking for an external (USB or Firewire) interface to record at least a single stereo 44.1kHz/24bit S/P-DIF signal I've come across the Aureon 7.1 Firewire but have not been able to find out whether it is already supported by ALSA. Another option would be the Aureon 5.1 USB MKII but according to the specs it is 16bit only. However when feeding S/P-DIF with a stereo 44.1kHz/24bit would the driver be recognize that and give me that signal unaltered or would it be trimmed to 16bit ? [Or is my understanding of S/P-DIF just plain wrong and such a signal would not go through the box at all ?] Any advice welcome, best, Michael -- Technosis GmbH, Geschäftsführer: Michael Gerdau, Tobias Dittmar Sitz Hamburg; HRB 89145 Amtsgericht Hamburg Vote against SPAM - see http://www.politik-digital.de/spam/ Michael Gerdau email: mgd(a)technosis.de GPG-keys available on request or at public keyserver

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[alsa-devel] [PATCH] multi-channel playback and capture fixes for stac92xx codecs
by Steve Longerbeam 04 May '07

04 May '07

Hi, I have picked up where Matt Porter left off on stac92xx HDA codec devel. I've been working with the 9200, 9221, 9202, 9250, and 9205 codecs, and I found some problems with muti-channel playback on 922x and 9205. Also a problem with input mux selection for codecs with more than one configured input pin. I've tested the attached patch on all the above listed codecs. Steve

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[alsa-devel] [PATCH] snd-usb-audio: Add another QuickCam ID
by Daniel Drake 04 May '07

04 May '07

This adds another Logitech QuickCam USB ID. These devices have vendor-specific device class values, but standards-compliant audio interfaces. Signed-off-by: Daniel Drake <dsd(a)gentoo.org> Index: linux/sound/usb/usbquirks.h =================================================================== --- linux.orig/sound/usb/usbquirks.h +++ linux/sound/usb/usbquirks.h @@ -53,6 +53,16 @@ .bInterfaceClass = USB_CLASS_AUDIO, .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL }, +{ + .match_flags = USB_DEVICE_ID_MATCH_DEVICE | + USB_DEVICE_ID_MATCH_INT_CLASS | + USB_DEVICE_ID_MATCH_INT_SUBCLASS, + .idVendor = 0x046d, + .idProduct = 0x08f6, + .bInterfaceClass = USB_CLASS_AUDIO, + .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL +}, + /* * Yamaha devices

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[alsa-devel] support for Medion laptops
by albox＠free.fr 04 May '07

04 May '07

Hi, I installed Ubuntu Feisty a few days ago and my sound card driver doesn't work anymore. It was working perfectly before updating to Feisty but I'm not sure the problem comes from the update since I was not using the last ALSA version but an older one patched with a patch released by Tobin Davis a few months ago (something else could have been changed in the ALSA source code since then) : --- alsa-driver/alsa-kernel/pci/hda/patch_realtek.c.orig 2006-10-08 10:58:28.000000000 -0700 +++ alsa-driver/alsa-kernel/pci/hda/patch_realtek.c 2006-10-09 10:50:03.000000000 -0700 @@ -112,6 +112,7 @@ ALC883_6ST_DIG, ALC888_DEMO_BOARD, ALC883_ACER, + ALC883_MEDION, ALC883_AUTO, ALC883_MODEL_LAST, }; @@ -5080,6 +5081,8 @@ .config = ALC883_ACER }, { .pci_subvendor = 0x1025, .pci_subdevice = 0x009f, .config = ALC883_ACER }, + { .pci_subvendor = 0x161f, .pci_subdevice = 0xd82b, + .modelname = "medion", .config = ALC883_MEDION } { .modelname = "auto", .config = ALC883_AUTO }, {} }; @@ -5167,6 +5170,20 @@ .channel_mode = alc883_3ST_2ch_modes, .input_mux = &alc883_capture_source, }, + [ALC883_MEDION] = { + .mixers = { alc883_base_mixer, + alc883_chmode_mixer }, + .init_verbs = { alc883_init_verbs, + alc882_eapd_verbs }, + .num_dacs = ARRAY_SIZE(alc883_dac_nids), + .dac_nids = alc883_dac_nids, + .num_adc_nids = ARRAY_SIZE(alc883_adc_nids), + .adc_nids = alc883_adc_nids, + .num_channel_mode = ARRAY_SIZE(alc883_sixstack_modes), + .channel_mode = alc883_sixstack_modes, + .input_mux = &alc883_capture_source, + } + }; You can find some parts of the emails about this subject on this web page : http://www.spinics.net/lists/alsa-devel/msg04396.html The driver (Developement release 1.0.14rc3) can detect my sound card but I can't figure out what's wrong. Can anybody help me ? $ dmesg | grep alsa [ 20.468000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/../../alsa-kernel/pci/hda/hda_intel.c:696: codec_mask = 0x3 [ 20.648000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:1768: hda_codec: model 'medion' is selected for config 161f:2054 (Medion laptop) [ 21.376000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/../../alsa-kernel/pci/hda/patch_si3054.c:245: si3054: cannot initialize. EXT MID = 0000 [ 21.384000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/../../alsa-kernel/pci/hda/patch_si3054.c:257: Link Frame Detect(FDT) is not ready (line status: 0000) [ 76.256000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/../../alsa-kernel/pci/hda/hda_intel.c:1158: azx_pcm_prepare: bufsize=0x10000, fragsize=0x1000, format=0x11 [ 76.256000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x2, stream=0x5, channel=0, format=0x11 [ 76.264000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x4, stream=0x5, channel=0, format=0x11 [ 76.272000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x3, stream=0x5, channel=0, format=0x11 [ 76.280000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x5, stream=0x5, channel=0, format=0x11 [ 76.292000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x2, stream=0x0, channel=0, format=0x0 [ 76.300000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x4, stream=0x0, channel=0, format=0x0 [ 76.308000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x3, stream=0x0, channel=0, format=0x0 [ 76.320000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x5, stream=0x0, channel=0, format=0x0 [ 76.332000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/../../alsa-kernel/pci/hda/hda_intel.c:1158: azx_pcm_prepare: bufsize=0x10000, fragsize=0x1000, format=0x11 [ 76.332000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x2, stream=0x5, channel=0, format=0x11 [ 76.344000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x4, stream=0x5, channel=0, format=0x11 [ 76.356000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x3, stream=0x5, channel=0, format=0x11 [ 76.364000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x5, stream=0x5, channel=0, format=0x11 [ 76.376000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x2, stream=0x0, channel=0, format=0x0 [ 76.384000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x4, stream=0x0, channel=0, format=0x0 [ 76.392000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x3, stream=0x0, channel=0, format=0x0 [ 76.408000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x5, stream=0x0, channel=0, format=0x0 [ 76.592000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/../../alsa-kernel/pci/hda/hda_intel.c:1158: azx_pcm_prepare: bufsize=0x10000, fragsize=0x1000, format=0x11 [ 76.592000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x2, stream=0x5, channel=0, format=0x11 [ 76.600000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x4, stream=0x5, channel=0, format=0x11 [ 76.608000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x3, stream=0x5, channel=0, format=0x11 [ 76.616000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x5, stream=0x5, channel=0, format=0x11 [ 153.564000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x2, stream=0x0, channel=0, format=0x0 [ 153.572000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x4, stream=0x0, channel=0, format=0x0 [ 153.580000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x3, stream=0x0, channel=0, format=0x0 [ 153.588000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x5, stream=0x0, channel=0, format=0x0 [ 216.896000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/../../alsa-kernel/pci/hda/hda_intel.c:1158: azx_pcm_prepare: bufsize=0x10000, fragsize=0x1000, format=0x11 [ 216.896000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x2, stream=0x5, channel=0, format=0x11 [ 216.904000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x4, stream=0x5, channel=0, format=0x11 [ 216.912000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x3, stream=0x5, channel=0, format=0x11 [ 216.920000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x5, stream=0x5, channel=0, format=0x11 [ 216.932000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x2, stream=0x0, channel=0, format=0x0 [ 216.940000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x4, stream=0x0, channel=0, format=0x0 [ 216.948000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x3, stream=0x0, channel=0, format=0x0 [ 216.956000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x5, stream=0x0, channel=0, format=0x0 [ 216.972000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/../../alsa-kernel/pci/hda/hda_intel.c:1158: azx_pcm_prepare: bufsize=0x10000, fragsize=0x1000, format=0x11 [ 216.972000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x2, stream=0x5, channel=0, format=0x11 [ 216.980000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x4, stream=0x5, channel=0, format=0x11 [ 216.988000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x3, stream=0x5, channel=0, format=0x11 [ 216.996000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x5, stream=0x5, channel=0, format=0x11 [ 218.824000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x2, stream=0x0, channel=0, format=0x0 [ 218.832000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x4, stream=0x0, channel=0, format=0x0 [ 218.840000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x3, stream=0x0, channel=0, format=0x0 [ 218.848000] ALSA /home/alboot/Sources/alsa/alsa-driver-1.0.14rc3/pci/hda/hda_codec.c:627: hda_codec_setup_stream: NID=0x5, stream=0x0, channel=0, format=0x0 Thanks

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[alsa-devel] dmix does not mix small files??
by Prabhu Sivaraja 03 May '07

03 May '07

Hi, I've been stuck on this dmix problem for the past week and have tried everything under the sun. Please any help or comment is much appreciated. Thanks a lot. Background info. ----------------------- In my ALSA driver I have thread that keeps track of hw_ptr(dmix) appl_ptr(for all other cases) and copies the incoming data from kernal buffer into device circular buffer(which is monitored by the device). I allocate 64KB kernal buffer in my module_init function . (See allocation below) snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, snd_dma_continuous_data(GFP_KERNEL), 64*1024 , 64*1024); So I monitor this kernal buffer and copy data from this to my device circular buffer which is also 64KB. My period size is defined as 32KB. (See below) substream->runtime->hw.period_bytes_min = 1024*32; substream->runtime->hw.period_bytes_max = 1024*32; substream->runtime->hw.periods_min = 2; substream->runtime->hw.periods_max = 2; My asound.conf file pcm.mix { type dmix ipc_key 1024 slave { pcm "hw:0,0" rate 48000 } } pcm.!default { type plug slave.pcm "mix" } Everything was working fine until I noticed something weird. When I am playing a long wav file by invoking aplay and then try and play another small wav file simultaneously, the second file never gets mixed if the file is less than 64KB(my buffer size). If the second file is larger than 64KB then the second file gets mixed with the first one as it should since I am using dmix plugin. So in order to debug this I tried to decrease my period_size = 4KB but when I do this my hw_ptr never moves. My question. 1. Why do you think a file smaller than 64KB does not get mixed. (Obviously it has something to do with my buffer size but I dont get why?) 2. When I decrease my period_size to 4KB while keeping my buffer size at 64KB, why doesnt my hw_ptr move? 3. How else would I debug this? Thanks in advance. I would really appreciate any help. Regards Prabhu.

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[alsa-devel] alsa test function?
by Ashlesha Shintre 03 May '07

03 May '07

Hi, Is there a test program for alsa, that gives a report on whether alsa is working correct with the underlying hardware or just does elementary testing of alsa on a system? Thanks, Ashlesha.

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[alsa-devel] 1.0.14rc4 release
by Jaroslav Kysela 03 May '07

03 May '07

Hello all, 1.0.14rc4 packages are available for download on http://www.alsa-project.org . The full changelog can be obtained here: http://www.alsa-project.org/changes/v1-0-14rc3--v1-0-14rc4.txt . Jaroslav ----- Jaroslav Kysela <perex(a)suse.cz> Linux Kernel Sound Maintainer ALSA Project, SUSE Labs

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[alsa-devel] Add support for new HP DV series laptops
by Tobin Davis 03 May '07

03 May '07

This patch adds support for 3 new HP laptops to the Conexant "Venice" driver. Signed off by Tobin Davis <tdavis(a)dsl-only.net>

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